MQTT-SN Gateway - Not able to publish or changed my clientID, but able to connect and subscribe?

I have a project using MQTT-SN protocol, I use this https://github.com/S3ler/arduino-mqtt-sn-client as my MQTT-SN Client (I'm Using nodeMCU same as Arduino ESP8266) , my MQTT-SN Gateway use paho.mqtt-sn.embedded-c on my laptop and for my broker I use Mosquitto on my laptop too

this is the code for the MQTT-SN client

#include <ESP8266WiFi.h>
#include <WiFiUdp.h>
#include <WiFiUdpSocket.h>
#include <MqttSnClient.h>

const char* ssid     = "xxx";
const char* password = "xxx";

#define buffer_length 10
char buffer[buffer_length + 1];
uint16_t buffer_pos = 0;

IPAddress gatewayIPAddress(192, 168, 1, 151);
uint16_t localUdpPort = 1884;

// #define gatewayHostAddress "arsmb.de"

WiFiUDP udp;
WiFiUdpSocket wiFiUdpSocket(udp, localUdpPort);
MqttSnClient<WiFiUdpSocket> mqttSnClient(wiFiUdpSocket);

const char* clientId = "Kevin";
char* subscribeTopicName = "test";
char* publishTopicName = "test";

int8_t qos = 0;

void mqttsn_callback(char *topic, uint8_t *payload, uint16_t length, bool retain) {
Serial.print("Received - Topic: ");
Serial.print(topic);
Serial.print(" Payload: ");
for (uint16_t i = 0; i < length; i++) {
char c =  (char) * (payload + i);
Serial.print(c);
}
Serial.print(" Lenght: ");
Serial.println(length);
}

void setup() {
Serial.begin(115200);
delay(1000);
pinMode (sensor,INPUT);
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);

/* Explicitly set the ESP8266 to be a WiFi-client, otherwise, it by default,
 would try to act as both a client and an access-point and could cause
 network-issues with your other WiFi-devices on your WiFi-network. */
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);

while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}

Serial.println("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());

Serial.print("Starting MqttSnClient - ");
mqttSnClient.setCallback(mqttsn_callback);
 if  (!mqttSnClient.begin()) {
Serial.print("Could not initialize MQTT-SN Client ");
while (true) {
  Serial.println(".");
  delay(1000);
 }
}
Serial.println(" ready!");
}

 void convertIPAddressAndPortToDeviceAddress(IPAddress& source, uint16_t port, device_address& target) {
 // IPAdress 0 - 3 bytes
 target.bytes[0] = source[0];
 target.bytes[1] = source[1];
 target.bytes[2] = source[2];
 target.bytes[3] = source[3];
 // Port 4 - 5 bytes
 target.bytes[4] = port >> 8;
 target.bytes[5] = (uint8_t) port ;
 }  


void loop() {
if (!mqttSnClient.is_mqttsn_connected()) {
#if defined(gatewayHostAddress)
IPAddress gatewayIPAddress;
if (!WiFi.hostByName(gatewayHostAddress, gatewayIPAddress, 20000)) {
  Serial.println("Could not lookup MQTT-SN Gateway.");
  return;
}
#endif
device_address gateway_device_address;
convertIPAddressAndPortToDeviceAddress(gatewayIPAddress, localUdpPort, gateway_device_address);
Serial.print("MQTT-SN Gateway device_address: ");
printDeviceAddress(&gateway_device_address);


if (!mqttSnClient.connect(&gateway_device_address, clientId, 180) ) {
  Serial.println("Could not connect MQTT-SN Client.");
  delay(1000);
  return;
}
Serial.println("MQTT-SN Client connected.");
mqttSnClient.subscribe(subscribeTopicName , qos);
  }

    if (Serial.available()> 0) {
    buffer[buffer_pos++] = Serial.read();
  if (buffer[buffer_pos - 1] == '\n') {
  // only qos -1, 0, 1 are supported
  if (!mqttSnClient.publish(buffer, publishTopicName , qos)) {
    Serial.println("Could not publish");
  }
  Serial.println("Published");
  memset(buffer, 0x0, buffer_length);
  buffer_pos = 0;
}
 }

 mqttSnClient.loop();

}

and this my MQTT-SN Gateway look, I can only connect and subscribe, I can't Publish or change my clientID

I already try to fix with https://github.com/S3ler/arduino-mqtt-sn-client/issues/3 but still I can't publish and I can only subscribe even my clientid won't change like I declared on my code

I don't know what's wrong with it,Can someone tell me what's wrong with my code?

Edit:

This is what it look like in my Arduino IDE Terminal, Someone know what is the error? or what is the problem that keep me can't publish?

00:57:06.516 -> Connecting to WiFi
00:57:07.061 -> .....
00:57:09.071 -> WiFi connected
00:57:09.071 -> IP address: 
00:57:09.071 -> 192.168.1.192
00:57:09.071 -> Starting MqttSnClient -  ready!
00:57:09.071 -> MQTT-SN Gateway device_address: 192, 168, 1, 151, 7, 92
00:57:09.173 -> MQTT-SN Client connected.
00:57:09.173 -> 
00:57:09.173 -> Exception (28):
00:57:09.173 -> epc1=0x4000bf80 epc2=0x00000000 epc3=0x00000000 excvaddr=0x00000000 depc=0x00000000
00:57:09.173 -> 
00:57:09.173 -> >>>stack>>>
00:57:09.173 -> 
00:57:09.173 -> ctx: cont
00:57:09.173 -> sp: 3ffffc80 end: 3fffffc0 offset: 0190
00:57:09.173 -> 3ffffe10:  00000011 3ffeeb84 00000000 fffffffe  
00:57:09.206 -> 3ffffe20:  00000011 00000001 00000001 3ffef57c  
00:57:09.206 -> 3ffffe30:  3ffef500 3ffef57c 3ffef4fc 40215182  
00:57:09.206 -> 3ffffe40:  3ffeec00 00000000 00000000 40215cef  
00:57:09.206 -> 3ffffe50:  00000016 3ffee478 3ffe8750 40210538  
00:57:09.206 -> 3ffffe60:  3ffeec00 0000005a 00000020 40100990  
00:57:09.206 -> 3ffffe70:  3ffeec00 3ffeec04 0000075c 3ffef5e0  
00:57:09.206 -> 3ffffe80:  00000810 00000102 00000000 3ffef500  
00:57:09.241 -> 3ffffe90:  0000075c 3ffef57c 3ffef4fc 4021058f  
00:57:09.241 -> 3ffffea0:  007a1200 59b425ea 00000000 40210628  
00:57:09.241 -> 3ffffeb0:  00000000 00000000 00000001 00000000  
00:57:09.241 -> 3ffffec0:  00000000 3ffef57c 00000000 40202b90  
00:57:09.241 -> 3ffffed0:  3ffee478 3ffee5c8 00000000 40203cae  
00:57:09.241 -> 3ffffee0:  00000013 3ffee4ba 3ffef4ac 00000008  
00:57:09.241 -> 3ffffef0:  00000000 3ffee4c0 3ffee4a8 40205a04  
00:57:09.275 -> 3fffff00:  00000008 3ffee4c0 3ffee4a8 40201771  
00:57:09.275 -> 3fffff10:  40205d30 9701a8c0 3ffe876f 40203405  
00:57:09.275 -> 3fffff20:  00000000 00000019 3ffee630 402034cc  
00:57:09.275 -> 3fffff30:  3ffee478 00002710 3ffee630 3ffe8750  
00:57:09.275 -> 3fffff40:  3ffee478 00000016 3ffee45c 40201c94  
00:57:09.275 -> 3fffff50:  0104040c 654b00b4 006e6976 00000000  
00:57:09.275 -> 3fffff60:  00000000 00000000 00000000 a8c00000  
00:57:09.275 -> 3fffff70:  5c079701 00000000 00000000 00000000  
00:57:09.309 -> 3fffff80:  3ffe8755 00000005 0000000c 00000001  
00:57:09.309 -> 3fffff90:  40201068 c001a8c0 feefeffe 3ffee75c  
00:57:09.309 -> 3fffffa0:  3fffdad0 00000000 3ffee71c 40203d90  
00:57:09.309 -> 3fffffb0:  feefeffe feefeffe 3ffe8500 40100c1d  
00:57:09.309 -> <<<stack<<<
00:57:09.309 -> 
00:57:09.309 ->  ets Jan  8 2013,rst cause:2, boot mode:(3,6)
00:57:09.343 -> 
00:57:09.343 -> load 0x4010f000, len 3456, room 16 
00:57:09.343 -> tail 0
00:57:09.343 -> chksum 0x84
00:57:09.343 -> csum 0x84
00:57:09.343 -> va5432625
00:57:09.343 -> ~ld
00:57:10.395 -> 

if anyone from this issue can help me , I want to know what is the problem and how can I fix it? Socket error on client <>, disconnecting with Paho MQTT-SN Gateway and ESP8266 CLient

I already decode the error and it say like this

Exception 28: LoadProhibited: A load referenced a page mapped with an 
attribute that does not permit loads
PC: 0x4000bf80
EXCVADDR: 0x00000000

Decoding stack results
0x4021547a: ip4_output_if_src at core/ipv4/ip4.c line 1590
0x40215fe3: ip_chksum_pseudo at core/inet_chksum.c line 395
0x40210830: udp_sendto_if_src at core/udp.c line 893
0x40100990: malloc(size_t) at C:\Users\ASUS\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.7.1\cores\esp8266\umm_malloc\umm_malloc.cpp line 511
0x40210887: udp_sendto_if at core/udp.c line 692
0x40210920: udp_sendto at core/udp.c line 599
0x40202c28: WiFiUDP::endPacket() at C:\Users\ASUS\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.7.1\libraries\ESP8266WiFi\src\WiFiUdp.cpp line 176
0x40204df5: uart_write(uart_t*, char const*, size_t) at C:\Users\ASUS\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.7.1\cores\esp8266\uart.cpp line 509
0x40204df5: uart_write(uart_t*, char const*, size_t) at C:\Users\ASUS\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.7.1\cores\esp8266\uart.cpp line 509
0x402033e4: HardwareSerial::write(unsigned char const*, unsigned int) at C:\Users\ASUS\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.7.1\cores\esp8266/HardwareSerial.h line 164
0x402033e4: HardwareSerial::write(unsigned char const*, unsigned int) at C:\Users\ASUS\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.7.1\cores\esp8266/HardwareSerial.h line 164
0x402033f0: HardwareSerial::write(unsigned char const*, unsigned int) at C:\Users\ASUS\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.7.1\cores\esp8266/HardwareSerial.h line 165
0x402036c1: Print::write(char const*) at C:\Users\ASUS\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.7.1\cores\esp8266/Print.h line 62
0x40201d34: loop() at C:\Users\ASUS\OneDrive\Documents\Arduino\Test/Test.ino line 133
0x40201074: mqttsn_callback(char*, unsigned char*, unsigned short, bool) at C:\Users\ASUS\OneDrive\Documents\Arduino\Test/Test.ino line 35
0x40204058: loop_wrapper() at C:\Users\ASUS\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.7.1\cores\esp8266\core_esp8266_main.cpp line 197

Is anyone know what the error mean? Please tell me and Thank You

Thank you for all, but i already fix my problem it seem there is a wrong code in the library and you must change it, right now i'm doing fine doing some publish